Data_Sheet_1_Derivation of Predator Functional Responses Using a Mechanistic Approach in a Natural System.PDF
The functional response is at the core of any predator-prey interactions as it establishes the link between trophic levels. The use of inaccurate functional response can profoundly affect the outcomes of population and community models. Yet most functional responses are evaluated using phenomenologi...
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ftfrontimediafig:oai:figshare.com:article/14177438 2023-05-15T14:31:09+02:00 Data_Sheet_1_Derivation of Predator Functional Responses Using a Mechanistic Approach in a Natural System.PDF Andréanne Beardsell Dominique Gravel Dominique Berteaux Gilles Gauthier Jeanne Clermont Vincent Careau Nicolas Lecomte Claire-Cécile Juhasz Pascal Royer-Boutin Joël Bêty 2021-03-08T04:35:44Z https://doi.org/10.3389/fevo.2021.630944.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Derivation_of_Predator_Functional_Responses_Using_a_Mechanistic_Approach_in_a_Natural_System_PDF/14177438 unknown doi:10.3389/fevo.2021.630944.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Derivation_of_Predator_Functional_Responses_Using_a_Mechanistic_Approach_in_a_Natural_System_PDF/14177438 CC BY 4.0 CC-BY Evolutionary Biology Ecology Invasive Species Ecology Landscape Ecology Conservation and Biodiversity Behavioural Ecology Community Ecology (excl. Invasive Species Ecology) Ecological Physiology Freshwater Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Population Ecology Terrestrial Ecology functional response predation trophic interactions tundra predator-prey interactions arctic fox (Vulpes lagopus) arctic Dataset 2021 ftfrontimediafig https://doi.org/10.3389/fevo.2021.630944.s001 2021-03-10T23:59:02Z The functional response is at the core of any predator-prey interactions as it establishes the link between trophic levels. The use of inaccurate functional response can profoundly affect the outcomes of population and community models. Yet most functional responses are evaluated using phenomenological models which often fail to discriminate among functional response shapes and cannot identify the proximate mechanisms regulating predator acquisition rates. Using a combination of behavioral, demographic, and experimental data collected over 20 years, we develop a mechanistic model based on species traits and behavior to assess the functional response of a generalist mammalian predator, the arctic fox (Vulpes lagopus), to various tundra prey species (lemmings and the nests of geese, passerines, and sandpipers). Predator acquisition rates derived from the mechanistic model were consistent with field observations. Although acquisition rates slightly decrease at high goose nest and lemming densities, none of our simulations resulted in a saturating response in all prey species. Our results highlight the importance of predator searching components in predator-prey interactions, especially predator speed, while predator acquisition rates were not limited by handling processes. By combining theory with field observations, our study provides support that the predator acquisition rate is not systematically limited at the highest prey densities observed in a natural system. Our study also illustrates how mechanistic models based on empirical estimates of the main components of predation can generate functional response shapes specific to the range of prey densities observed in the wild. Such models are needed to fully untangle proximate drivers of predator-prey population dynamics and to improve our understanding of predator-mediated interactions in natural communities. Dataset Arctic Fox Arctic Tundra Vulpes lagopus Frontiers: Figshare Arctic |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Evolutionary Biology Ecology Invasive Species Ecology Landscape Ecology Conservation and Biodiversity Behavioural Ecology Community Ecology (excl. Invasive Species Ecology) Ecological Physiology Freshwater Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Population Ecology Terrestrial Ecology functional response predation trophic interactions tundra predator-prey interactions arctic fox (Vulpes lagopus) arctic |
spellingShingle |
Evolutionary Biology Ecology Invasive Species Ecology Landscape Ecology Conservation and Biodiversity Behavioural Ecology Community Ecology (excl. Invasive Species Ecology) Ecological Physiology Freshwater Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Population Ecology Terrestrial Ecology functional response predation trophic interactions tundra predator-prey interactions arctic fox (Vulpes lagopus) arctic Andréanne Beardsell Dominique Gravel Dominique Berteaux Gilles Gauthier Jeanne Clermont Vincent Careau Nicolas Lecomte Claire-Cécile Juhasz Pascal Royer-Boutin Joël Bêty Data_Sheet_1_Derivation of Predator Functional Responses Using a Mechanistic Approach in a Natural System.PDF |
topic_facet |
Evolutionary Biology Ecology Invasive Species Ecology Landscape Ecology Conservation and Biodiversity Behavioural Ecology Community Ecology (excl. Invasive Species Ecology) Ecological Physiology Freshwater Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Population Ecology Terrestrial Ecology functional response predation trophic interactions tundra predator-prey interactions arctic fox (Vulpes lagopus) arctic |
description |
The functional response is at the core of any predator-prey interactions as it establishes the link between trophic levels. The use of inaccurate functional response can profoundly affect the outcomes of population and community models. Yet most functional responses are evaluated using phenomenological models which often fail to discriminate among functional response shapes and cannot identify the proximate mechanisms regulating predator acquisition rates. Using a combination of behavioral, demographic, and experimental data collected over 20 years, we develop a mechanistic model based on species traits and behavior to assess the functional response of a generalist mammalian predator, the arctic fox (Vulpes lagopus), to various tundra prey species (lemmings and the nests of geese, passerines, and sandpipers). Predator acquisition rates derived from the mechanistic model were consistent with field observations. Although acquisition rates slightly decrease at high goose nest and lemming densities, none of our simulations resulted in a saturating response in all prey species. Our results highlight the importance of predator searching components in predator-prey interactions, especially predator speed, while predator acquisition rates were not limited by handling processes. By combining theory with field observations, our study provides support that the predator acquisition rate is not systematically limited at the highest prey densities observed in a natural system. Our study also illustrates how mechanistic models based on empirical estimates of the main components of predation can generate functional response shapes specific to the range of prey densities observed in the wild. Such models are needed to fully untangle proximate drivers of predator-prey population dynamics and to improve our understanding of predator-mediated interactions in natural communities. |
format |
Dataset |
author |
Andréanne Beardsell Dominique Gravel Dominique Berteaux Gilles Gauthier Jeanne Clermont Vincent Careau Nicolas Lecomte Claire-Cécile Juhasz Pascal Royer-Boutin Joël Bêty |
author_facet |
Andréanne Beardsell Dominique Gravel Dominique Berteaux Gilles Gauthier Jeanne Clermont Vincent Careau Nicolas Lecomte Claire-Cécile Juhasz Pascal Royer-Boutin Joël Bêty |
author_sort |
Andréanne Beardsell |
title |
Data_Sheet_1_Derivation of Predator Functional Responses Using a Mechanistic Approach in a Natural System.PDF |
title_short |
Data_Sheet_1_Derivation of Predator Functional Responses Using a Mechanistic Approach in a Natural System.PDF |
title_full |
Data_Sheet_1_Derivation of Predator Functional Responses Using a Mechanistic Approach in a Natural System.PDF |
title_fullStr |
Data_Sheet_1_Derivation of Predator Functional Responses Using a Mechanistic Approach in a Natural System.PDF |
title_full_unstemmed |
Data_Sheet_1_Derivation of Predator Functional Responses Using a Mechanistic Approach in a Natural System.PDF |
title_sort |
data_sheet_1_derivation of predator functional responses using a mechanistic approach in a natural system.pdf |
publishDate |
2021 |
url |
https://doi.org/10.3389/fevo.2021.630944.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Derivation_of_Predator_Functional_Responses_Using_a_Mechanistic_Approach_in_a_Natural_System_PDF/14177438 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Fox Arctic Tundra Vulpes lagopus |
genre_facet |
Arctic Fox Arctic Tundra Vulpes lagopus |
op_relation |
doi:10.3389/fevo.2021.630944.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Derivation_of_Predator_Functional_Responses_Using_a_Mechanistic_Approach_in_a_Natural_System_PDF/14177438 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fevo.2021.630944.s001 |
_version_ |
1766304855671963648 |